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Mathematics 10 Online
OpenStudy (anonymous):

In the system shown below, what is the sum of the x-coordinates of all solutions? 7x^2+3y^2=187 3y^2-7x=47

OpenStudy (raden):

maybe this is a shortcut. subtract the 1st equation with 2nd equation, what do you get ?

OpenStudy (anonymous):

I got 7x^2+6y^2-7x-140=0. Is that correct?

OpenStudy (anonymous):

I have ((-5,2)(-5,-2)(4,5)(4,-5) would the sum of all x-coordinates be -2?

OpenStudy (raden):

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